Actinoptera discoidea (Fallén, 1814)
on Gnaphalium, Helichrysum
gall
in spring the larvae induces an onion-shaped, almost a cm high rosette gall. In summer either a fusiform, up to 6 mm long swelling of a stem or the larve lives in the sclerified receptacle; larva a white maggot, always solitary.
host plants
Asteraceae, narrowly oligophagous
Gnaphalium sylvaticum, uliginosum; Helichrysum arenarium.
references
Buhr (1964b), Khaghaninia & Gharajedaghi (2012a).